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Receiver based methods and devices for combating co-channel NTSC interference in digital transmission

  • US 5,777,692 A
  • Filed: 07/18/1996
  • Issued: 07/07/1998
  • Est. Priority Date: 12/29/1994
  • Status: Expired due to Term
First Claim
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1. A method of removing co-channel interference from a digital signal, comprising the steps of:

  • receiving the digital signal which includes a plurality of symbols, noise and co-channel interference;

    delaying the received digital signal;

    adaptively filtering the delayed signal using a feed forward adaptive filter having a plurality of adjustable taps;

    subtracting the adaptively filtered signal from the received digital signal and producing an error signal; and

    recursively using the error signal to adjust the taps of the adaptive filter to minimize the mean squared error of the error signal such that the adaptive filter becomes tuned to the co-channel interference.

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